\\[-1.8ex] Soil Heterogeneity & $-$0.114$^{***}$ & $-$0.023 & $-$0.009 & $-$0.008 & $-$0.009 & $-$0.007 & $-$0.007 \\ 
  & (0.040) & (0.019) & (0.018) & (0.017) & (0.017) & (0.018) & (0.018) \\ 
\\[-1.8ex] 
Observations & 380,379 & 380,379 & 380,379 & 380,379 & 380,379 & 377,766 & 377,766 \\ 
R$^{2}$ & 0.001 & 0.083 & 0.084 & 0.084 & 0.084 & 0.084 & 0.087 \\ 
